CD63 and neoplasm: We found that (1) MTSS1L was repressed when the M10 cells were delivered with exosomes or co-cultured with 231-CD63 to mimic the tumor microenvironment (Figure 4A); (2) MTSS1L was repressed and increased when miR-92b-5p was overexpressed or knocked down in the M10 and 231-CD63 cells (Figure 4B).